Good video. Using drawbars is like using colors in a painting.
I've never been able to get a LH Bass sound I like without using a non drawbar voice. 16' & 8' just isn't bassey enough for me. Just this morning watched a Tony Maonace video with him playing a Hammond SK2 thru a portable Leslie.. The bass was great and I'm assuming he was just using the drawbars ? I know on the Jimmy Smith albums there was a direct line taken off the organ pre-amp so bass could be added at the recording board.